Nissan has announced updates for the all-wheel-drive 2013 Nissan GT-R, which will go on sale in January 2012. Output is raised to a whopping 545 ponies, while torque grows to 463 lb-ft. Transmission feel and noise were tamed, and the suspension was retuned. A rearview monitor is now standard on all models.

To gain the extra 15 hp, Nissan claims to have improved the intake efficiency of the twin-turbocharged V6, reduced airflow resistance and improved the exhaust system. In addition, all of the GT-R engines are hand built, meaning they can vary slightly in power. We tested last year's model and got a 0-to-60-mph time of 2.9 seconds, so we'd expect this to be a tad quicker.

The transmission improvements were realized with a strengthened design of the shift fork arm and a firmer fixing bearing for the flywheel housing. High-performance differential oil, usually reserved for Nissan's race cars, is used in all applications.

The suspension consists of a Bilstein DampTronic system that adjusts to road surfaces and can be stiffened up with the touch of a button. Brembo continues to supply the brakes with six-piston front calipers and four-piston rears.